Guiseppe Mazzuoccolo from the Dipartimento di Scienze Fisiche, Informatiche e Matematiche dell' Universitá di Modena e Reggio Emilia, Modena, Italy, visited the PACE and the working group of Prof. Dr. Steffen from November 2 to 14. In his talks "Flows and bisections in cubic graphs" and "Maximum fraction of edges covered by t perfect matchings" he gave a survey on his recent developments in graph theory.